The common grackle forages on the ground, in shallow water or in shrubs; it will steal food from other birds. It is omnivorous, eating insects, minnows, frogs, eggs, berries, seeds, grain and even small birds and mice.

The anhinga does not have waterproof feathers. As a result it can dive and search for underwater prey, including fish and amphibians. It can stay below the surface more easily and for longer periods of time.